Table 2

Cognitive ability and anthropometric data: group means and analyses

Variable HSS (n=25) PWS (n=30)
Mean (s.d.) Mean (s.d.)
HSS, hyperphagic short stature; PWS, Prader—Willi syndrome.
*P < 0.05; **P < 0.01.
1.Anthropometric data were unavailable for 3 children with PWS.
Full-scale IQ 77.7 (17.8) 54.0 (13.7)**
Performance IQ 83.4 (18.7) 56.0 (11.8)**
Verbal IQ 76.3 (18.2) 59.8 (16.6)**
Standardised height1 -2.6 (1.1) -1.5 (1.5)*
Standardised body mass index -0.1 (1.2) 2.4 (2.0)**